Quick Question on 87 RX-7

I have a 1987 RX-7 that is really nice clean and no rust the only thing about it is that is a two seater which their is nothing wrong with but i has just curious if their is any way that i can make this 2 seater into a 4 seater. Or in other words find a RX-7 that is a 4 seater and get the seat or bench and put it in mines after some modifications.

yeah you can find a rear seat that just bolts in.
there were very few models sold with them

BUT

1) i'll probably be expensive to get one
2) you will only be able to fit your briefcase and pet monkey back there
3) its a sports car, it only needs 2 seats.

might i suggest a scion tc, has lots of room in the back.